(say shape of x + y + z) you would not use the r portion i.e. x2 + y2 + z2 = x + y + z, thus the r portion from the circle no use in this part of assessment? - Any unique ways to remember formulas for all shapes(cylinder, cone etc.) - I get confused, f(x,y,z) = formula, great! However with the shapes e.g. z = y + x, the z is not the portion f(x,y,z) etc. The z = x + y shape (its just an example) would just be telling you that "at the z plane you got a drawing of x + y", but to change it into a function it would be f(x,y,z) = -z + x + y?
Im second year part-time self studying student in my later years so be easy. Many thanks!